| /* |
| * FFV1 codec |
| * |
| * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| static inline int RENAME(predict)(TYPE *src, TYPE *last) |
| { |
| const int LT = last[-1]; |
| const int T = last[0]; |
| const int L = src[-1]; |
| |
| return mid_pred(L, L + T - LT, T); |
| } |
| |
| static inline int RENAME(get_context)(PlaneContext *p, TYPE *src, |
| TYPE *last, TYPE *last2) |
| { |
| const int LT = last[-1]; |
| const int T = last[0]; |
| const int RT = last[1]; |
| const int L = src[-1]; |
| |
| if (p->quant_table[3][127] || p->quant_table[4][127]) { |
| const int TT = last2[0]; |
| const int LL = src[-2]; |
| return p->quant_table[0][(L - LT) & 0xFF] + |
| p->quant_table[1][(LT - T) & 0xFF] + |
| p->quant_table[2][(T - RT) & 0xFF] + |
| p->quant_table[3][(LL - L) & 0xFF] + |
| p->quant_table[4][(TT - T) & 0xFF]; |
| } else |
| return p->quant_table[0][(L - LT) & 0xFF] + |
| p->quant_table[1][(LT - T) & 0xFF] + |
| p->quant_table[2][(T - RT) & 0xFF]; |
| } |
| |